Describe the cardiac cycle in more detail. Include valve actions and the forces that cause those...

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Medical Sciences

Describe the cardiac cycle in more detail. Include valveactions and the forces that cause those valve actions.

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The period of time that begins with contraction of the atria and ends with ventricular relaxation is known as the cardiac cycle The period of contraction that the heart undergoes while it pumps blood into circulation is called systole The period of relaxation that occurs as the chambers fill with blood is called diastole Both the atria and ventricles undergo systole and diastole and it is essential that these components be carefully regulated and coordinated to ensure blood is pumped efficiently to the bodyFluids whether gases or liquids are materials that flow according to pressure gradientsthat is they move from regions that are higher in pressure to regions that are lower in pressure when the heart chambers are relaxed blood will flow into the atria from the veins which are higher in pressure As blood flows into the atria the pressure will rise so the blood will initially move passively from the atria into the ventricles When the action potential triggers the muscles in the atria to contract the pressure within the atria rises further pumping blood into the ventricles During ventricular systole pressure rises in the ventricles pumping blood into the pulmonary trunk from the right ventricle and See Answer

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